at 7 p.m. last night, the temperature was 10 degree. at 7 a.m. the next morning the temperature was -2 degree. By how much did t
he temperature change from 7 p.m. to 7 a.m.? By how much did it changed each hour?
2 answers:
Change in temperature = -2 - 10 = -12 degrees
rate of change per hour = -12 / 12 = -1 degree.
The temperature changed by 12 degrees in 12 hours meaning one degree per hour.
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Just solve.
3(k-x)= -3x-9
3k - 3x = -3x - 9 ← equation without parentheses
3k - 3x + 3x = - 9
3k = -9
k = -9/3
k = -3 ← simplest form
Answer:
( -1 , 1 )
Step-by-step explanation:
(x1,y1) = (5,9)
(x2,y2) = (-7,-7)
=(-7+5/2 , -7+9/2)
= (-1,1)
